Monitoring coral reefs in optically-deep waters
Monitoring coral reefs in optically-deep waters
复制标题
监测光学深水中的珊瑚礁
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
F. Gilbes
中科院分区：
文献类型：
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作者：
R. Armstrong;H. Singh;S. Rivero;F. Gilbes
虽然遥感技术是监测清澈寡食水域中浅层（<20 m 深度）珊瑚礁的有用工具，但对光学深水中存在的珊瑚礁进行大规模评估需要其他方法，例如使用现场平台进行高分辨率光学和声学成像。光学深层水域是机载或卫星传感器接收到的上升流辐射源自水柱而没有任何底部信号贡献的水域。海底自主水下航行器 (AUV) 是绘制和描述中光珊瑚礁（深度在 30 至约 100 m 之间）以及浑浊区域浅珊瑚礁的理想平台。该 AUV 用于获取高分辨率数字图像，以表征波多黎各西南部两条长照片横断面沿线的地貌和主要海底成分。这些定量 AUV 调查还为未来评估更深珊瑚礁区域的变化提供了基线，而对于世界大多数地区来说，这些变化在很大程度上仍然未知。
Although remote sensing technology is a useful tool for monitoring shallow (<20 m depth) coral reefs present in clear oligothrophic waters, the large-scale assessment of reefs present in optically-deep waters requires other approaches such as the use of in situ platforms for high-resolution optical and acoustic imaging. Optically-deep waters are those where the upwelling radiance received by the airborne or satellite sensor originates from the water column without any bottom signal contribution. The Seabed autonomous underwater vehicle (AUV) is an ideal platform for mapping and characterizing mesophotic reefs, those present between 30 to about 100 m depth, and for shallow reefs in turbid areas. This AUV was utilized to acquire high-resolution digital images to characterize the geomorphology and dominant benthic components present along two long photo-transects in southwestern Puerto Rico. These quantitative AUV surveys also provide a baseline for future evaluation of change in the deeper coral reef zones, which for most areas of the world, remain largely unknown.